Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a94f5ed47d866fe…

MALICIOUS

PDF

78.6 KB Created: 2021-03-17 10:22:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 7951559c52f5fc636ca96ecea01dd7cc SHA-1: 2388ba8cc5debc2c4d51edbcb9cb1412fe6ca68f SHA-256: 5a94f5ed47d866feac90a2db82810f3925e02a9aca51b1c6662325d80e9cb107
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, with one heuristic specifically identifying a "PDF link farm" and another flagging it as a "Phishing Trojan". The document body, though heavily obfuscated, contains text related to search terms, suggesting a lure. The presence of multiple unknown URLs indicates a high likelihood of malicious redirection or content delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://dugedepap.ru/wix?keyword=bible+in+90+days+audio PDF link annotation
    • http://b2b-servis.ru/cuisinart_pro_custom_11_not_turning_on1plz1.pdfIn PDF document text
    • http://znakomstva69.space/motalelepeguja72lz2.pdfIn PDF document text
    • http://jigitozunawada.66ghz.com/74366616548.pdfIn PDF document text
    • http://tewazezila.66ghz.com/halloween_worksheets_for_2nd_grade.pdfIn PDF document text
    • http://fesebenawasoz.iblogger.org/zofilifovetiwumizep.pdfIn PDF document text
    • https://tekadepaja.weebly.com/uploads/1/3/4/3/134341299/fb0618f468b.pdfIn PDF document text
    • https://nisudine.weebly.com/uploads/1/3/1/4/131454656/eda2b87e13061.pdfIn PDF document text
    • http://relofol.iblogger.org/sufagozomorawo.pdfIn PDF document text
    • https://xunipemadigorof.weebly.com/uploads/1/3/0/8/130813553/6985194.pdfIn PDF document text
    • https://pigamudabuv.weebly.com/uploads/1/3/4/2/134235231/6132676.pdfIn PDF document text
    • http://swast-group.website/teachers_pensions_auto_enrolment_letter_templatesxoe7r.pdfIn PDF document text
    • https://feposogasutam.weebly.com/uploads/1/3/1/3/131384530/tolirixavijoziwefaw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/turip/the_sims_2_university_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tasufagijaremo/dojorofumizuruwo.pdfIn PDF document text
    • https://s3.amazonaws.com/puretulenuza/gitlab_artifacts_link.pdfIn PDF document text
    • https://s3.amazonaws.com/libusamagowuvo/according_to_matthew_full_movie_300mb.pdfIn PDF document text
    • https://s3.amazonaws.com/bivanud/vasari_lives_of_the_artists.pdfIn PDF document text
    • http://genezifovijewi.epizy.com/guzevom.pdfIn PDF document text
    • https://s3.amazonaws.com/nowonovege/3679084984.pdfIn PDF document text
    • http://xuxusemo.epizy.com/79699003010.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F1 5312 bytes
SHA-256: 88239d3460dd50bced561e2ee55e6a17175d36a58e7fa15f6383ff05a9564c00
font_01_sfnt_off00010717.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10717 10788 bytes
SHA-256: c932c3e746b8fd3ac26f8522634b9ba17421668050d5c430a69204c9580ff959

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